C++ and time

sandra · #1 24-Jan-2009, 13:19

Hi
please i want help from you, my question is:

How I can pause an execution of program for a few minutes depends on user inter key ,in my program i use time to calculate position of person who is falling from the plane ,I use openGl with C++?
I am trying sleep() , System("PAUSE") , and i hadn't useful from any ones.

nostaque · #2 24-Jan-2009, 20:13

This works for me. Hope it helps.

CPP / C++ / C Code:

#include <stdio.h>
#include <iostream>
#include <windows.h>
using namespace std;

int main()
{
    int t;
    cout << "Enter time to pause in second: ";
    cin >> t;
    Sleep(t* 1000);
    cout << "End of time\n";
return 0;
}

sandra · #3 25-Jan-2009, 10:25

Quote:

Originally Posted by nostaque

This works for me. Hope it helps.

CPP / C++ / C Code:

#include <stdio.h>
#include <iostream>
#include <windows.h>
using namespace std;

int main()
{
    int t;
    cout << "Enter time to pause in second: ";
    cin >> t;
    Sleep(t* 1000);
    cout << "End of time\n";
return 0;
}

thank you for replay ..
my problem not with pause execution exactly i take time from computer with GetTickCount() to calculate the position then when i want to pause execution , the time didn't pause and when i resume execution the time take wrong value ,then sleep () doesn't work .

Blake · #4 29-Jan-2009, 07:50

Use a variable to keep track of the total time that the system is paused. Then subtract that time from the time returned by getTickCount(). Example:

CPP / C++ / C Code:


int pauseTime = 0;

int getTime()
{
	return GetTickCount() - pauseTime;
}

int main(int argc, char * argv [])
{
	int t = GetTickCount();
	while (true)
	{
		int pauseStart = GetTickCount();
		cin.get();
		pauseTime += GetTickCount() - pauseStart;
	}
}

The getTime() function will give you the time minus the time spent paused.

On a side note (since you're using OpenGL), if you're using GLUT, you can use glutGet(GLUT_ELAPSED_TIME); to get the elapsed time since the last call to glutInit(). Then you don't need to include windows.h, which is good if you're aiming for platform independence.

nowocien · #5 29-Jan-2009, 12:08

man your sharp Blake.. care to tell us or just me about some of the programming projects that are NOT listed on your website??

Dan

Blake · #6 29-Jan-2009, 22:04

Thanks! I don't have this on my website yet.

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C++ and time

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